Priming valve unit for internal combustion engines



FIG. 1 is a side elevational view of a priming valve unit for internal combustion engines embodying my new design;

FIG. 2 is a front end elevational view thereof;

FIG. 3 is a rear end elevational view thereof;

FIG. 4 is a side elevational view thereof opposite to that of FIG. 1;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a priming valve unit for internal combustion engines, as shown. 